fs/f2fs/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * f2fs sysfs interface
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  * Copyright (c) 2017 Chao Yu <[email protected]>
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/proc_fs.h>
  11 #include <linux/f2fs_fs.h>
  12 #include <linux/seq_file.h>
  13
  14 #include "f2fs.h"
  15 #include "segment.h"
  16 #include "gc.h"
  17
  18 static struct proc_dir_entry *f2fs_proc_root;
  19
  20 /* Sysfs support for f2fs */
  21 enum {
  22         GC_THREAD,      /* struct f2fs_gc_thread */
  23         SM_INFO,        /* struct f2fs_sm_info */
  24         DCC_INFO,       /* struct discard_cmd_control */
  25         NM_INFO,        /* struct f2fs_nm_info */
  26         F2FS_SBI,       /* struct f2fs_sb_info */
  27 #ifdef CONFIG_F2FS_FAULT_INJECTION
  28         FAULT_INFO_RATE,        /* struct f2fs_fault_info */
  29         FAULT_INFO_TYPE,        /* struct f2fs_fault_info */
  30 #endif
  31         RESERVED_BLOCKS,        /* struct f2fs_sb_info */
  32 };
  33
  34 struct f2fs_attr {
  35         struct attribute attr;
  36         ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
  37         ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
  38                          const char *, size_t);
  39         int struct_type;
  40         int offset;
  41         int id;
  42 };
  43
  44 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
  45 {
  46         if (struct_type == GC_THREAD)
  47                 return (unsigned char *)sbi->gc_thread;
  48         else if (struct_type == SM_INFO)
  49                 return (unsigned char *)SM_I(sbi);
  50         else if (struct_type == DCC_INFO)
  51                 return (unsigned char *)SM_I(sbi)->dcc_info;
  52         else if (struct_type == NM_INFO)
  53                 return (unsigned char *)NM_I(sbi);
  54         else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
  55                 return (unsigned char *)sbi;
  56 #ifdef CONFIG_F2FS_FAULT_INJECTION
  57         else if (struct_type == FAULT_INFO_RATE ||
  58                                         struct_type == FAULT_INFO_TYPE)
  59                 return (unsigned char *)&F2FS_OPTION(sbi).fault_info;
  60 #endif
  61         return NULL;
  62 }
  63
  64 static ssize_t dirty_segments_show(struct f2fs_attr *a,
  65                 struct f2fs_sb_info *sbi, char *buf)
  66 {
  67         return snprintf(buf, PAGE_SIZE, "%llu\n",
  68                 (unsigned long long)(dirty_segments(sbi)));
  69 }
  70
  71 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
  72                 struct f2fs_sb_info *sbi, char *buf)
  73 {
  74         struct super_block *sb = sbi->sb;
  75
  76         if (!sb->s_bdev->bd_part)
  77                 return snprintf(buf, PAGE_SIZE, "0\n");
  78
  79         return snprintf(buf, PAGE_SIZE, "%llu\n",
  80                 (unsigned long long)(sbi->kbytes_written +
  81                         BD_PART_WRITTEN(sbi)));
  82 }
  83
  84 static ssize_t features_show(struct f2fs_attr *a,
  85                 struct f2fs_sb_info *sbi, char *buf)
  86 {
  87         struct super_block *sb = sbi->sb;
  88         int len = 0;
  89
  90         if (!sb->s_bdev->bd_part)
  91                 return snprintf(buf, PAGE_SIZE, "0\n");
  92
  93         if (f2fs_sb_has_encrypt(sbi))
  94                 len += snprintf(buf, PAGE_SIZE - len, "%s",
  95                                                 "encryption");
  96         if (f2fs_sb_has_blkzoned(sbi))
  97                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
  98                                 len ? ", " : "", "blkzoned");
  99         if (f2fs_sb_has_extra_attr(sbi))
 100                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 101                                 len ? ", " : "", "extra_attr");
 102         if (f2fs_sb_has_project_quota(sbi))
 103                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 104                                 len ? ", " : "", "projquota");
 105         if (f2fs_sb_has_inode_chksum(sbi))
 106                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 107                                 len ? ", " : "", "inode_checksum");
 108         if (f2fs_sb_has_flexible_inline_xattr(sbi))
 109                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 110                                 len ? ", " : "", "flexible_inline_xattr");
 111         if (f2fs_sb_has_quota_ino(sbi))
 112                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 113                                 len ? ", " : "", "quota_ino");
 114         if (f2fs_sb_has_inode_crtime(sbi))
 115                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 116                                 len ? ", " : "", "inode_crtime");
 117         if (f2fs_sb_has_lost_found(sbi))
 118                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 119                                 len ? ", " : "", "lost_found");
 120         if (f2fs_sb_has_sb_chksum(sbi))
 121                 len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
 122                                 len ? ", " : "", "sb_checksum");
 123         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 124         return len;
 125 }
 126
 127 static ssize_t current_reserved_blocks_show(struct f2fs_attr *a,
 128                                         struct f2fs_sb_info *sbi, char *buf)
 129 {
 130         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks);
 131 }
 132
 133 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
 134                         struct f2fs_sb_info *sbi, char *buf)
 135 {
 136         unsigned char *ptr = NULL;
 137         unsigned int *ui;
 138
 139         ptr = __struct_ptr(sbi, a->struct_type);
 140         if (!ptr)
 141                 return -EINVAL;
 142
 143         if (!strcmp(a->attr.name, "extension_list")) {
 144                 __u8 (*extlist)[F2FS_EXTENSION_LEN] =
 145                                         sbi->raw_super->extension_list;
 146                 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
 147                 int hot_count = sbi->raw_super->hot_ext_count;
 148                 int len = 0, i;
 149
 150                 len += snprintf(buf + len, PAGE_SIZE - len,
 151                                                 "cold file extension:\n");
 152                 for (i = 0; i < cold_count; i++)
 153                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 154                                                                 extlist[i]);
 155
 156                 len += snprintf(buf + len, PAGE_SIZE - len,
 157                                                 "hot file extension:\n");
 158                 for (i = cold_count; i < cold_count + hot_count; i++)
 159                         len += snprintf(buf + len, PAGE_SIZE - len, "%s\n",
 160                                                                 extlist[i]);
 161                 return len;
 162         }
 163
 164         ui = (unsigned int *)(ptr + a->offset);
 165
 166         return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
 167 }
 168
 169 static ssize_t __sbi_store(struct f2fs_attr *a,
 170                         struct f2fs_sb_info *sbi,
 171                         const char *buf, size_t count)
 172 {
 173         unsigned char *ptr;
 174         unsigned long t;
 175         unsigned int *ui;
 176         ssize_t ret;
 177
 178         ptr = __struct_ptr(sbi, a->struct_type);
 179         if (!ptr)
 180                 return -EINVAL;
 181
 182         if (!strcmp(a->attr.name, "extension_list")) {
 183                 const char *name = strim((char *)buf);
 184                 bool set = true, hot;
 185
 186                 if (!strncmp(name, "[h]", 3))
 187                         hot = true;
 188                 else if (!strncmp(name, "[c]", 3))
 189                         hot = false;
 190                 else
 191                         return -EINVAL;
 192
 193                 name += 3;
 194
 195                 if (*name == '!') {
 196                         name++;
 197                         set = false;
 198                 }
 199
 200                 if (strlen(name) >= F2FS_EXTENSION_LEN)
 201                         return -EINVAL;
 202
 203                 down_write(&sbi->sb_lock);
 204
 205                 ret = f2fs_update_extension_list(sbi, name, hot, set);
 206                 if (ret)
 207                         goto out;
 208
 209                 ret = f2fs_commit_super(sbi, false);
 210                 if (ret)
 211                         f2fs_update_extension_list(sbi, name, hot, !set);
 212 out:
 213                 up_write(&sbi->sb_lock);
 214                 return ret ? ret : count;
 215         }
 216
 217         ui = (unsigned int *)(ptr + a->offset);
 218
 219         ret = kstrtoul(skip_spaces(buf), 0, &t);
 220         if (ret < 0)
 221                 return ret;
 222 #ifdef CONFIG_F2FS_FAULT_INJECTION
 223         if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 224                 return -EINVAL;
 225 #endif
 226         if (a->struct_type == RESERVED_BLOCKS) {
 227                 spin_lock(&sbi->stat_lock);
 228                 if (t > (unsigned long)(sbi->user_block_count -
 229                                 F2FS_OPTION(sbi).root_reserved_blocks)) {
 230                         spin_unlock(&sbi->stat_lock);
 231                         return -EINVAL;
 232                 }
 233                 *ui = t;
 234                 sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 235                                 sbi->user_block_count - valid_user_blocks(sbi));
 236                 spin_unlock(&sbi->stat_lock);
 237                 return count;
 238         }
 239
 240         if (!strcmp(a->attr.name, "discard_granularity")) {
 241                 if (t == 0 || t > MAX_PLIST_NUM)
 242                         return -EINVAL;
 243                 if (t == *ui)
 244                         return count;
 245                 *ui = t;
 246                 return count;
 247         }
 248
 249         if (!strcmp(a->attr.name, "migration_granularity")) {
 250                 if (t == 0 || t > sbi->segs_per_sec)
 251                         return -EINVAL;
 252         }
 253
 254         if (!strcmp(a->attr.name, "trim_sections"))
 255                 return -EINVAL;
 256
 257         if (!strcmp(a->attr.name, "gc_urgent")) {
 258                 if (t >= 1) {
 259                         sbi->gc_mode = GC_URGENT;
 260                         if (sbi->gc_thread) {
 261                                 sbi->gc_thread->gc_wake = 1;
 262                                 wake_up_interruptible_all(
 263                                         &sbi->gc_thread->gc_wait_queue_head);
 264                                 wake_up_discard_thread(sbi, true);
 265                         }
 266                 } else {
 267                         sbi->gc_mode = GC_NORMAL;
 268                 }
 269                 return count;
 270         }
 271         if (!strcmp(a->attr.name, "gc_idle")) {
 272                 if (t == GC_IDLE_CB)
 273                         sbi->gc_mode = GC_IDLE_CB;
 274                 else if (t == GC_IDLE_GREEDY)
 275                         sbi->gc_mode = GC_IDLE_GREEDY;
 276                 else
 277                         sbi->gc_mode = GC_NORMAL;
 278                 return count;
 279         }
 280
 281         *ui = t;
 282
 283         if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
 284                 f2fs_reset_iostat(sbi);
 285         return count;
 286 }
 287
 288 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
 289                         struct f2fs_sb_info *sbi,
 290                         const char *buf, size_t count)
 291 {
 292         ssize_t ret;
 293         bool gc_entry = (!strcmp(a->attr.name, "gc_urgent") ||
 294                                         a->struct_type == GC_THREAD);
 295
 296         if (gc_entry) {
 297                 if (!down_read_trylock(&sbi->sb->s_umount))
 298                         return -EAGAIN;
 299         }
 300         ret = __sbi_store(a, sbi, buf, count);
 301         if (gc_entry)
 302                 up_read(&sbi->sb->s_umount);
 303
 304         return ret;
 305 }
 306
 307 static ssize_t f2fs_attr_show(struct kobject *kobj,
 308                                 struct attribute *attr, char *buf)
 309 {
 310         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 311                                                                 s_kobj);
 312         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 313
 314         return a->show ? a->show(a, sbi, buf) : 0;
 315 }
 316
 317 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
 318                                                 const char *buf, size_t len)
 319 {
 320         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 321                                                                         s_kobj);
 322         struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
 323
 324         return a->store ? a->store(a, sbi, buf, len) : 0;
 325 }
 326
 327 static void f2fs_sb_release(struct kobject *kobj)
 328 {
 329         struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
 330                                                                 s_kobj);
 331         complete(&sbi->s_kobj_unregister);
 332 }
 333
 334 enum feat_id {
 335         FEAT_CRYPTO = 0,
 336         FEAT_BLKZONED,
 337         FEAT_ATOMIC_WRITE,
 338         FEAT_EXTRA_ATTR,
 339         FEAT_PROJECT_QUOTA,
 340         FEAT_INODE_CHECKSUM,
 341         FEAT_FLEXIBLE_INLINE_XATTR,
 342         FEAT_QUOTA_INO,
 343         FEAT_INODE_CRTIME,
 344         FEAT_LOST_FOUND,
 345         FEAT_SB_CHECKSUM,
 346 };
 347
 348 static ssize_t f2fs_feature_show(struct f2fs_attr *a,
 349                 struct f2fs_sb_info *sbi, char *buf)
 350 {
 351         switch (a->id) {
 352         case FEAT_CRYPTO:
 353         case FEAT_BLKZONED:
 354         case FEAT_ATOMIC_WRITE:
 355         case FEAT_EXTRA_ATTR:
 356         case FEAT_PROJECT_QUOTA:
 357         case FEAT_INODE_CHECKSUM:
 358         case FEAT_FLEXIBLE_INLINE_XATTR:
 359         case FEAT_QUOTA_INO:
 360         case FEAT_INODE_CRTIME:
 361         case FEAT_LOST_FOUND:
 362         case FEAT_SB_CHECKSUM:
 363                 return snprintf(buf, PAGE_SIZE, "supported\n");
 364         }
 365         return 0;
 366 }
 367
 368 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
 369 static struct f2fs_attr f2fs_attr_##_name = {                   \
 370         .attr = {.name = __stringify(_name), .mode = _mode },   \
 371         .show   = _show,                                        \
 372         .store  = _store,                                       \
 373         .struct_type = _struct_type,                            \
 374         .offset = _offset                                       \
 375 }
 376
 377 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname)    \
 378         F2FS_ATTR_OFFSET(struct_type, name, 0644,               \
 379                 f2fs_sbi_show, f2fs_sbi_store,                  \
 380                 offsetof(struct struct_name, elname))
 381
 382 #define F2FS_GENERAL_RO_ATTR(name) \
 383 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
 384
 385 #define F2FS_FEATURE_RO_ATTR(_name, _id)                        \
 386 static struct f2fs_attr f2fs_attr_##_name = {                   \
 387         .attr = {.name = __stringify(_name), .mode = 0444 },    \
 388         .show   = f2fs_feature_show,                            \
 389         .id     = _id,                                          \
 390 }
 391
 392 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_urgent_sleep_time,
 393                                                         urgent_sleep_time);
 394 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
 395 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
 396 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
 397 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode);
 398 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode);
 399 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
 400 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
 401 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity);
 402 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
 403 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
 404 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
 405 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
 406 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
 407 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_seq_blocks, min_seq_blocks);
 408 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
 409 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ssr_sections, min_ssr_sections);
 410 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
 411 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
 412 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
 413 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
 414 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, migration_granularity, migration_granularity);
 415 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
 416 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
 417 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 418 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 419                                         interval_time[DISCARD_TIME]);
 420 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
 421 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 422 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 423 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
 424 F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
 425 #ifdef CONFIG_F2FS_FAULT_INJECTION
 426 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
 427 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
 428 #endif
 429 F2FS_GENERAL_RO_ATTR(dirty_segments);
 430 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 431 F2FS_GENERAL_RO_ATTR(features);
 432 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
 433
 434 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 435 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 436 #endif
 437 #ifdef CONFIG_BLK_DEV_ZONED
 438 F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
 439 #endif
 440 F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
 441 F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
 442 F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
 443 F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
 444 F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
 445 F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
 446 F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);
 447 F2FS_FEATURE_RO_ATTR(lost_found, FEAT_LOST_FOUND);
 448 F2FS_FEATURE_RO_ATTR(sb_checksum, FEAT_SB_CHECKSUM);
 449
 450 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
 451 static struct attribute *f2fs_attrs[] = {
 452         ATTR_LIST(gc_urgent_sleep_time),
 453         ATTR_LIST(gc_min_sleep_time),
 454         ATTR_LIST(gc_max_sleep_time),
 455         ATTR_LIST(gc_no_gc_sleep_time),
 456         ATTR_LIST(gc_idle),
 457         ATTR_LIST(gc_urgent),
 458         ATTR_LIST(reclaim_segments),
 459         ATTR_LIST(max_small_discards),
 460         ATTR_LIST(discard_granularity),
 461         ATTR_LIST(batched_trim_sections),
 462         ATTR_LIST(ipu_policy),
 463         ATTR_LIST(min_ipu_util),
 464         ATTR_LIST(min_fsync_blocks),
 465         ATTR_LIST(min_seq_blocks),
 466         ATTR_LIST(min_hot_blocks),
 467         ATTR_LIST(min_ssr_sections),
 468         ATTR_LIST(max_victim_search),
 469         ATTR_LIST(migration_granularity),
 470         ATTR_LIST(dir_level),
 471         ATTR_LIST(ram_thresh),
 472         ATTR_LIST(ra_nid_pages),
 473         ATTR_LIST(dirty_nats_ratio),
 474         ATTR_LIST(cp_interval),
 475         ATTR_LIST(idle_interval),
 476         ATTR_LIST(discard_idle_interval),
 477         ATTR_LIST(gc_idle_interval),
 478         ATTR_LIST(iostat_enable),
 479         ATTR_LIST(readdir_ra),
 480         ATTR_LIST(gc_pin_file_thresh),
 481         ATTR_LIST(extension_list),
 482 #ifdef CONFIG_F2FS_FAULT_INJECTION
 483         ATTR_LIST(inject_rate),
 484         ATTR_LIST(inject_type),
 485 #endif
 486         ATTR_LIST(dirty_segments),
 487         ATTR_LIST(lifetime_write_kbytes),
 488         ATTR_LIST(features),
 489         ATTR_LIST(reserved_blocks),
 490         ATTR_LIST(current_reserved_blocks),
 491         NULL,
 492 };
 493
 494 static struct attribute *f2fs_feat_attrs[] = {
 495 #ifdef CONFIG_F2FS_FS_ENCRYPTION
 496         ATTR_LIST(encryption),
 497 #endif
 498 #ifdef CONFIG_BLK_DEV_ZONED
 499         ATTR_LIST(block_zoned),
 500 #endif
 501         ATTR_LIST(atomic_write),
 502         ATTR_LIST(extra_attr),
 503         ATTR_LIST(project_quota),
 504         ATTR_LIST(inode_checksum),
 505         ATTR_LIST(flexible_inline_xattr),
 506         ATTR_LIST(quota_ino),
 507         ATTR_LIST(inode_crtime),
 508         ATTR_LIST(lost_found),
 509         ATTR_LIST(sb_checksum),
 510         NULL,
 511 };
 512
 513 static const struct sysfs_ops f2fs_attr_ops = {
 514         .show   = f2fs_attr_show,
 515         .store  = f2fs_attr_store,
 516 };
 517
 518 static struct kobj_type f2fs_sb_ktype = {
 519         .default_attrs  = f2fs_attrs,
 520         .sysfs_ops      = &f2fs_attr_ops,
 521         .release        = f2fs_sb_release,
 522 };
 523
 524 static struct kobj_type f2fs_ktype = {
 525         .sysfs_ops      = &f2fs_attr_ops,
 526 };
 527
 528 static struct kset f2fs_kset = {
 529         .kobj   = {.ktype = &f2fs_ktype},
 530 };
 531
 532 static struct kobj_type f2fs_feat_ktype = {
 533         .default_attrs  = f2fs_feat_attrs,
 534         .sysfs_ops      = &f2fs_attr_ops,
 535 };
 536
 537 static struct kobject f2fs_feat = {
 538         .kset   = &f2fs_kset,
 539 };
 540
 541 static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 542                                                 void *offset)
 543 {
 544         struct super_block *sb = seq->private;
 545         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 546         unsigned int total_segs =
 547                         le32_to_cpu(sbi->raw_super->segment_count_main);
 548         int i;
 549
 550         seq_puts(seq, "format: segment_type|valid_blocks\n"
 551                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 552
 553         for (i = 0; i < total_segs; i++) {
 554                 struct seg_entry *se = get_seg_entry(sbi, i);
 555
 556                 if ((i % 10) == 0)
 557                         seq_printf(seq, "%-10d", i);
 558                 seq_printf(seq, "%d|%-3u", se->type,
 559                                         get_valid_blocks(sbi, i, false));
 560                 if ((i % 10) == 9 || i == (total_segs - 1))
 561                         seq_putc(seq, '\n');
 562                 else
 563                         seq_putc(seq, ' ');
 564         }
 565
 566         return 0;
 567 }
 568
 569 static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 570                                                 void *offset)
 571 {
 572         struct super_block *sb = seq->private;
 573         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 574         unsigned int total_segs =
 575                         le32_to_cpu(sbi->raw_super->segment_count_main);
 576         int i, j;
 577
 578         seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
 579                 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
 580
 581         for (i = 0; i < total_segs; i++) {
 582                 struct seg_entry *se = get_seg_entry(sbi, i);
 583
 584                 seq_printf(seq, "%-10d", i);
 585                 seq_printf(seq, "%d|%-3u|", se->type,
 586                                         get_valid_blocks(sbi, i, false));
 587                 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 588                         seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 589                 seq_putc(seq, '\n');
 590         }
 591         return 0;
 592 }
 593
 594 static int __maybe_unused iostat_info_seq_show(struct seq_file *seq,
 595                                                void *offset)
 596 {
 597         struct super_block *sb = seq->private;
 598         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 599         time64_t now = ktime_get_real_seconds();
 600
 601         if (!sbi->iostat_enable)
 602                 return 0;
 603
 604         seq_printf(seq, "time:          %-16llu\n", now);
 605
 606         /* print app IOs */
 607         seq_printf(seq, "app buffered:  %-16llu\n",
 608                                 sbi->write_iostat[APP_BUFFERED_IO]);
 609         seq_printf(seq, "app direct:    %-16llu\n",
 610                                 sbi->write_iostat[APP_DIRECT_IO]);
 611         seq_printf(seq, "app mapped:    %-16llu\n",
 612                                 sbi->write_iostat[APP_MAPPED_IO]);
 613
 614         /* print fs IOs */
 615         seq_printf(seq, "fs data:       %-16llu\n",
 616                                 sbi->write_iostat[FS_DATA_IO]);
 617         seq_printf(seq, "fs node:       %-16llu\n",
 618                                 sbi->write_iostat[FS_NODE_IO]);
 619         seq_printf(seq, "fs meta:       %-16llu\n",
 620                                 sbi->write_iostat[FS_META_IO]);
 621         seq_printf(seq, "fs gc data:    %-16llu\n",
 622                                 sbi->write_iostat[FS_GC_DATA_IO]);
 623         seq_printf(seq, "fs gc node:    %-16llu\n",
 624                                 sbi->write_iostat[FS_GC_NODE_IO]);
 625         seq_printf(seq, "fs cp data:    %-16llu\n",
 626                                 sbi->write_iostat[FS_CP_DATA_IO]);
 627         seq_printf(seq, "fs cp node:    %-16llu\n",
 628                                 sbi->write_iostat[FS_CP_NODE_IO]);
 629         seq_printf(seq, "fs cp meta:    %-16llu\n",
 630                                 sbi->write_iostat[FS_CP_META_IO]);
 631         seq_printf(seq, "fs discard:    %-16llu\n",
 632                                 sbi->write_iostat[FS_DISCARD]);
 633
 634         return 0;
 635 }
 636
 637 static int __maybe_unused victim_bits_seq_show(struct seq_file *seq,
 638                                                 void *offset)
 639 {
 640         struct super_block *sb = seq->private;
 641         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 642         struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 643         int i;
 644
 645         seq_puts(seq, "format: victim_secmap bitmaps\n");
 646
 647         for (i = 0; i < MAIN_SECS(sbi); i++) {
 648                 if ((i % 10) == 0)
 649                         seq_printf(seq, "%-10d", i);
 650                 seq_printf(seq, "%d", test_bit(i, dirty_i->victim_secmap) ? 1 : 0);
 651                 if ((i % 10) == 9 || i == (MAIN_SECS(sbi) - 1))
 652                         seq_putc(seq, '\n');
 653                 else
 654                         seq_putc(seq, ' ');
 655         }
 656         return 0;
 657 }
 658
 659 int __init f2fs_init_sysfs(void)
 660 {
 661         int ret;
 662
 663         kobject_set_name(&f2fs_kset.kobj, "f2fs");
 664         f2fs_kset.kobj.parent = fs_kobj;
 665         ret = kset_register(&f2fs_kset);
 666         if (ret)
 667                 return ret;
 668
 669         ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 670                                    NULL, "features");
 671         if (ret)
 672                 kset_unregister(&f2fs_kset);
 673         else
 674                 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
 675         return ret;
 676 }
 677
 678 void f2fs_exit_sysfs(void)
 679 {
 680         kobject_put(&f2fs_feat);
 681         kset_unregister(&f2fs_kset);
 682         remove_proc_entry("fs/f2fs", NULL);
 683         f2fs_proc_root = NULL;
 684 }
 685
 686 int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 687 {
 688         struct super_block *sb = sbi->sb;
 689         int err;
 690
 691         sbi->s_kobj.kset = &f2fs_kset;
 692         init_completion(&sbi->s_kobj_unregister);
 693         err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
 694                                 "%s", sb->s_id);
 695         if (err)
 696                 return err;
 697
 698         if (f2fs_proc_root)
 699                 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
 700
 701         if (sbi->s_proc) {
 702                 proc_create_single_data("segment_info", S_IRUGO, sbi->s_proc,
 703                                 segment_info_seq_show, sb);
 704                 proc_create_single_data("segment_bits", S_IRUGO, sbi->s_proc,
 705                                 segment_bits_seq_show, sb);
 706                 proc_create_single_data("iostat_info", S_IRUGO, sbi->s_proc,
 707                                 iostat_info_seq_show, sb);
 708                 proc_create_single_data("victim_bits", S_IRUGO, sbi->s_proc,
 709                                 victim_bits_seq_show, sb);
 710         }
 711         return 0;
 712 }
 713
 714 void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
 715 {
 716         if (sbi->s_proc) {
 717                 remove_proc_entry("iostat_info", sbi->s_proc);
 718                 remove_proc_entry("segment_info", sbi->s_proc);
 719                 remove_proc_entry("segment_bits", sbi->s_proc);
 720                 remove_proc_entry("victim_bits", sbi->s_proc);
 721                 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
 722         }
 723         kobject_del(&sbi->s_kobj);
 724 }